Pith Number

pith:YASJGDEW

pith:2018:YASJGDEWBKN2NBGU2O7OZAK663

not attested not anchored not stored refs pending

Regularity of weak solutions and supersolutions to the porous medium equation

Pekka Lehtel\"a, Stefan Sturm, Verena B\"ogelein

arxiv:1801.05249 v1 · 2018-01-16 · math.AP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YASJGDEWBKN2NBGU2O7OZAK663}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:25:47.406879Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c024930c960a9ba684d4d3beec815ef6c0081bf81c1a5af28b4566518d10bd89

Aliases

arxiv: 1801.05249 · arxiv_version: 1801.05249v1 · doi: 10.48550/arxiv.1801.05249 · pith_short_12: YASJGDEWBKN2 · pith_short_16: YASJGDEWBKN2NBGU · pith_short_8: YASJGDEW

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/YASJGDEWBKN2NBGU2O7OZAK663 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: c024930c960a9ba684d4d3beec815ef6c0081bf81c1a5af28b4566518d10bd89

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e8c7ff67e4e0d0d4a5ea4ef138f60755d3497854b329ebe53e4543c06cdbd22c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2018-01-16T13:29:48Z",
    "title_canon_sha256": "9a830d38a6b301ff7c8a5d6ba120af108d1e48127e30d922496e7aba9924d9b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.05249",
    "kind": "arxiv",
    "version": 1
  }
}